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Hi!

At Hibernate Search, we are currently working on an Elasticsearch backend (aside from the existing Lucene backend).

As part of this effort, to provide a smooth migration path, we need to be able to rewrite the Lucene queries as Elasticsearch queries. We know it will be neither perfect or comprehensive but we want it to be the best possible experience.

It works well in many cases but several implementations of Query don't have the necessary getters to be able to extract the information from the Query.

The attached patch add getters to several implementations of Query. It would be nice if it could be applied.

Any chance it could be applied to the next point release too? (probably not but I'd better ask).